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TI-2025-40939 Aliases CVE-2025-66518GHSA-f8r6-6222-9pvc

Apache Kyuubi: Unauthorized directory access due to missing path normalization

Priority MEDIUM 40CWE-27Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.

Summary

Any client who can access to Apache Kyuubi Server via Kyuubi frontend protocols can bypass server-side config kyuubi.session.local.dir.allow.list and use local files which are not listed in the config. This issue affects Apache Kyuubi: from 1.6.0 through 1.10.2. Users are recommended to upgrade to version 1.10.3 or upper, which fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00996 62nd percentileScored 2026-11-07
Fix Fixed org.apache.kyuubi:kyuubi-server_2.12 (Maven): 1.10.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Kyuubi1.6.0 – 1.10.2—No fix listedCNA
—org.apache.kyuubi:kyuubi-server_2.12 (Maven)1.6.0 to before 1.10.31.10.3Patch availableGHSA-f8r6-6222-9pvc
  • Apache Kyuubi VendorApache Affected 1.6.0 – 1.10.2 Fixed in — No fix listed CNA
  • org.apache.kyuubi:kyuubi-server_2.12 (Maven) Vendor— Affected 1.6.0 to before 1.10.3 Fixed in 1.10.3 Patch available GHSA-f8r6-6222-9pvc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:kyuubi:*:*:*:*:*:*:*:*1.6.0 to before 1.10.3VulnerableApache
  • cpe:2.3:a:apache:kyuubi:*:*:*:*:*:*:*:* Versions 1.6.0 to before 1.10.3 Vulnerable ·Apache

Remediation

  • Fix · GHSA-f8r6-6222-9pvc org.apache.kyuubi:kyuubi-server_2.12 (Maven) Fixed in 1.10.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-66518
  2. 2026-10-03 Alias added: GHSA-f8r6-6222-9pvc

References

Advisory 3

Other 1

  • TI-2026-37809 Apache Kyuubi: REST batch multipart upload path traversal allows controlled file write CVSS 3.1CRITICAL 9.8
  • TI-2026-19260 Apache Kyuubi: Unrestricted access via Kyuubi engine-ui proxy CVSS 3.1HIGH 7.3
  • TI-2026-44530 Apache Kyuubi: kyuubi.session.local.dir.allow.list bypass via unprefixed Spark file-conf aliases CVSS 3.1HIGH 8.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences